﻿#region BSD 3-Clause License
/* Copyright (c) 2012, Intel Corporation
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 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
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 * 3. Neither the name of Intel Corporation nor the names of its contributors may
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#endregion

using System.Collections.ObjectModel;

namespace OpenHopla.Geometry
{
    /// <summary>
    /// Sit at the feet of TriangleGuru and learn how the legs of a triangle sit.
    /// </summary>
    /// <remarks>
    /// Theoretically, TriangleGuru has great knowledge of triangle theory.
    /// In practice, it is wise to verify what TriangleGuru asserts.
    /// Study, for example, Chiasmus: Are TriangleGuru's remarks a chiasmus example for study?
    /// She might say so. She might almost be right. But how far can TriangleGuru be trusted?
    /// I wonder about TriangleGuru's definitions.
    /// Teach us TriangleGuru! Or speaking as Yoda might speak: O Guru, triangle us teach!
    /// </remarks>
    class TriangleGuru
    {
        private static TriangleTester _triangleTester = new TriangleTester();

        public Collection<TriangleType> ClassifyTriangle(Triangle triangle)
        {
            Collection<TriangleType> triangleTypes = new Collection<TriangleType>();

            if (_triangleTester.IsEquilateral(triangle))
            {
                triangleTypes.Add(TriangleType.Equilateral);
            }
            if (_triangleTester.IsIsosceles(triangle))
            {
                triangleTypes.Add(TriangleType.Isosceles);
            }
            if (_triangleTester.IsScalene(triangle))
            {
                triangleTypes.Add(TriangleType.Scalene);
            }
            if (_triangleTester.IsRight(triangle))
            {
                triangleTypes.Add(TriangleType.Right);
            }

            return triangleTypes;
        }
    }
}
